Introducing Michigan to the Diverging Diamond Interchange.
At the time of our concept study, the first DDI had yet to be fully built and was virtually unheard of in the U.S. However, by carefully analyzing the DDI then under construction in Missouri and performing extensive traffic modeling, our team validated the feasibility of the innovative solution. We proved that a DDI could safely move the highest volume of traffic and resolve the congestion problem in Auburn Hills. We showed how a smaller footprint and tighter ramp configurations could save more than $10 million while eliminating 20 right-of-way parcels, two acres of wetland impacts, 3,000 feet of sound wall, and four bridges compared to MDOT’s previous design. Our efforts garnered support from both city and MDOT officials for the novel concept.